The financial terms of his investment is unknown, but Robinson, whose nickname was “The Admiral” in the NBA, invested through his own private equity firm called Admiral Capital Group.

Shaquille O’Neal (Retired)

Shaquille O’Neal ran the “Pitch Shaq” contest during SXSW 2013.

More than 150 teams pitched and he ultimately settled with two winners: Beam, a mobile videoconferencing device maker, and Speakerfy, an app that lets you synch music between Apple devices. Financial terms were not disclosed, but Shaq agreed to provide capital contributions to both companies.